Brunner and Lay 3 H Thread Standard Carbide Rock Drill Bit

Brunner and Lay 3″ H Thread Standard Carbide Rock Drill Bit

Carbide rock bits have a longer service life compared to steel bits. Combine these rock drill bits with H-Thread drill steel for strong, smooth drilling. Full size tungsten carbide inserts, which resist gauge wear and abrasion, makes this our most popular item. The design allows for multiple sharpenings and continued reuse until the inserts are consumed.